For readability I prefer when my units look distinctly different from other units. SC2 has a habit of making all visual cues blend into an incomprehensible mess, so I like that CybrosX has made the two Stalker units visually different.
The only thing what is going to be problem...is Proofread fixes- I will update some alarak's lines..but stalkers or zealots or hybrids or rasgul...this will be problem..I will ask stringstorm if he can do some fixes but.....He is really awesome guy but i am glad for every single line he gives to me. He had some troubles now so...I hope I will get lines from him for mission pack 2 :D
As I've said before, I am pretty confident that I can produce more varied voice acting than you currently have in the campaign for every single unit you need redone. Alarak's voice is incredibly specific so in addition to him I can do other units with no issues. Only problem would be female characters, which we already talked about over PM.